Process of removing traces of chlorine from air



March 30 1926. v 1,578,8 0:

' L. ElN I PROCESS OF REMOVING TRACES OF CHLORINE FROM AIR Original Filed pril 19, 1925,

Patented Mar. 30, 1926.

LUDWIG ROSENSTEIN, OF SAN FRANCISCO 'CA'LIFOBNIA.

' rnocnss or 'nniuovrno TRACES or CHLOBINE FROM AIR.

Application filed -19, 11923, No. 63'8;'254. :Renewefl August 3 1; 1925.

To all whom it may concern: v

I Be it known that I, LUDWIG RosnNs'rEIN, a citizen of the United States, residing at San Francisco, in 'thefcounty of San Francisco, State of Californiafha-veinventeda new and useful Process of Removing'Tr-aces 0t Chlorine from Air, of which the following is' a [specification in such full and clear terms as will enable those skilled "inthe art to construct and use the same. .This invention relates to a process ,of re- -moving Waste chlorine from the air or other gases carrying it. It will be understood by those skilled in the art that in many'anech-anical processes Chlopiiiegas isv passed through suitable apparatus, fin the purpose of carrying on adhren'rirmlv j ea-c-tizon and in many of these cases theresultant waste product carries.suflicientsmall traces of chlorine to prevent that wasteproduct fI'OIIl being exhausted into the atmosphere because of the deleterious nature wf even the small percentage of chlorine deified.

corrosive action of .the chlorine which has In order to produce a waste product that will 'not be objectionable, some means to remove every trace of free chlorine-from the waste product must be made use of, and

- the present invention removesjthat small 'trace of chlorine, leavinga waste product Y that is u'nobjectionabie to "surrounding neighbors. V a In the drawing there is illustrated a diagrammat ical View, partly in vertical section,

showing the apparatus capable-of carrying .out the process inwh'ich thesarhe numerals are applied to the same portion thronghont,

In the diagrammatic-a1 i l lu's-tration of the apparatus vfor. carrying out this 'process,-:

the nun-1cm] '1 indicates a stack made of suitable material, capable of withstanding the supports at bottom and it is mounted upon othersupponts =(2)n A pipe admits the chlorine laden gases to the stack and they pass upwardly through a massfof scrap iron mounted on supre o)- -y At "the top .of-the stack there are some tiles (6) to distribute the solution ereuly over the mass of scrap iron in the stack.

A pipe at the bottom ot the stack leads to a suitable pump pump in turn delivers the solution out through pipe (9) 'to the top of the stack where itis spread over a massot scrap iron and is again ready p for the um i The discovery herein involve-d lies the afiinity of the minute quantity of chlorine gas for, iron when in the presence of ferrous chloride solution.

The reaction involved is obscure, but probably includes an; addition of chlorine to the ferrous chloride to produce ferric chloride, followed by a further reaction to produce ferrous chloride solution, there be T ing very little or no ferric chloride present by test at any time.

The-advantage o -\v'ill conti1n1e indefinitely by merely adding scrap iron to the stack and withdrawing the as it may becometoo concentrated.

A turther advantage of this process lies in the fact that the product of the process is a salable product when removed from the i this process is'that it I ferrous chloride solution from time to time,

apparatus used to carry out this process. evaporatedianfd further chlorinated to the "form of solid ferric chloride or its concentrated solution.

With this process substantially every trace ceeds so strongly that minute quantities o t chlorine are completely absorbed.

imaajt I claim as and desire to secure by Letters Patent of the United States is as follows, but I ,am 'awane'that there may he modifications of the process within the purview of the appended claim '.A process of "removing traces oi chlorine .gases which-comprises passmg the gas to be treated over a loody of scrap icon and keepingsaid "body of iron wet with a iterrous of. free energies is removed from the :air and I chloride solution daring the passage of the as. p

In testimony avheneot I have hereunto set my hand this 14th day of 'Apr i1, A. 1).. 1923. I

LUDWIG ROSENSIEIN. 

